Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2018 6 10.  Predictions up to the next  14.0 days:

     Date     Time(AURA) AURA Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/12/2018   19:58:20   (  79.52, 137.36) 06/12/2018   19:58:20  (  79.52, 137.40)    0.91                 0
 06/12/2018   20:45:23   ( -81.58,  -0.85) 06/12/2018   20:46:36  ( -80.85,  -2.04)   83.91                73
 06/15/2018   11:25:28   ( -79.32,  84.30) 06/15/2018   11:24:36  ( -79.33,  84.34)    1.02                52
 06/15/2018   12:14:47   (  79.58,-106.34) 06/15/2018   12:15:13  (  79.58,-106.30)    1.00                26
 06/18/2018   03:41:53   ( -79.42,-159.16) 06/18/2018   03:41:27  ( -79.43,-159.10)    1.25                26
 06/18/2018   04:31:12   (  79.67,  10.21) 06/18/2018   04:32:04  (  79.67,  10.28)    1.51                52
 06/20/2018   19:11:06   (  73.19, 126.71) 06/20/2018   19:09:53  (  73.50, 124.87)   67.68                73
 06/20/2018   19:58:19   ( -79.52, -42.63) 06/20/2018   19:58:19  ( -79.52, -42.54)    1.95                 0
 06/23/2018   11:25:26   (  79.28, -96.00) 06/23/2018   11:24:36  (  79.27, -96.09)    2.04                50